Can't upload a theme

I deleted my theme and tried to redownload it because I was having issues with it and now when I try to upload it I get this: The uploaded file exceeds the upload_max_filesize directive in php.ini.”

I am using Zerif Pro and my website is photoperfectphotobooth.com if that helps. I also tried to upload a different theme, flaton, and I got the same error message.